The process of photosynthesis is essential in the oxygen/carbon dioxide cycle. photosynthesis removes from the atmosphere and produces and releases into the atmosphere.
a) glucose, oxygen
b) oxygen, glucose
c) carbon dioxide, oxygen
d) oxygen, carbon dioxide

The answer is C) carbon dioxide, oxygen.

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

So lets eliminate some answers:

Oxygen can not convert itself to glucose and plants don't take in oxygen so this answer is automatically eliminated

Plants take in carbon dioxide and convert it to oxygen basically how humans breath but inverted, not the other way around.

Glucose naturally is not found in the atmosphere in the first place so if a plant were to survive is would have to be in a glucose enriched environment which is very uncommon meaning it would be very rare to be a living functional plant that can photosynthesize. So this is checked off the list!

So we are now left with one sentence that would make sense

Plants take in carbon dioxide meaning the first section of this answer is right and they release oxygen which is also correct therefore this statement is valid and is the correct answer

Hope this helped (:

Sources I used:

u i forgot the answer?